Spain on Thursday activated emergency health procedures at Madrid's Adolfo Suárez Madrid-Barajas airport after a passenger on an Air France flight from Paris complained of shivering.
However airline sources told The Local that initial indications suggested this was not a case of Ebola. Nevertheless the passenger, who was on a connecting flight from Paris after returning from Africa, has been taken to a hospital in the Spanish capital where he will be isolated until medical tests are carried out.
The crew of the plane alerted health authorities on the ground in Barajas when they became aware the passenger was unwell, according to Spanish news agency Europa Press.
The plane carrying 183 passengers left Charles de Gaulle in Paris at 9.35am and arrived at 11.30am, national daily El País reported.
Sources at Air France told Europa Press passengers had disembarked "normally".
An Air France spokesperson told The Local the passenger, had been isolated for medical checks.
According to the airline the passenger did not show signs of having a fever, contradicting some Spanish media reports.